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Kitty [74]
3 years ago
12

I'm having trouble with my wireless headphones that won't turn on at all it's not blinking why? need help asap.....​

Chemistry
1 answer:
svetoff [14.1K]3 years ago
8 0

Answer:

Try a hard reset: Press and hold both the power button and the volume button (plus the other 2 as well perhaps) for about 10 seconds and then release. Check if the earphones will then either show that they are charging (with the cable inserted of course) or that they will turn on if the Power button is pressed.                                                                                                                          Explanation:Hope this helped you

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Geologists use the decay of potassium-40 in volcanic rocks to determine their age. Potassium-40 has a half-life of 1.26 109 year
melomori [17]

Answer:

m_{o} \approx 3.247\times 10^{-7}\,g

Explanation:

The mass of radioactive isotope at a certain time is given by the following expression:

m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }

Time constant can be calculed in terms of half-life:

\tau = \frac{t_{1/2}}{\ln 2}

\tau = \frac{1.26\times 10^{9}\,yr}{\ln 2}

\tau = 1.818\times 10^{9}\,yr

The initial mass is:

m_{o} = \frac{2.73\times 10^{-7}\,g}{e^{-\frac{3.15\times 10^{8}\,yr}{1.818\times 10^{9}\,yr} }}

m_{o} \approx 3.247\times 10^{-7}\,g

8 0
3 years ago
Convert 4.50 moles of Fe to atoms of Fe
olya-2409 [2.1K]
Each mole of a substance contains 6.02 x 10²³ particles
Atoms of Fe = 4.5 x 6.02 x 10²³
= 2.709 x 10²⁹ atoms
7 0
3 years ago
The names and chemical formulae of some chemical compounds are written in the first two columns of the table below. Each compoun
charle [14.2K]

Answer:

See below  

Explanation:

<u>          Name         </u>  <u>Formula </u>      <u>       Major species     </u> <u>  </u>        

Zinc iodide              ZnI₂            H₂O(ℓ),  I⁻(aq), Zn²⁺(aq),  

Nitrogen(I) oxide     N₂O           H₂O(ℓ),  N₂O(aq)

Sodium nitrite         NaNO₂      H₂O(ℓ),  Na⁺(aq), NO₂⁻(aq)

Glucose                   C₆H₁₂O₆    H₂O(ℓ),  C₆H₁₂O₆(aq)

Nickel(II) iodide       NiI₂            H₂O(ℓ),  I⁻(aq), Ni²⁺(aq)

  • Glucose and nitrogen(I) oxide are covalent compounds. They do not dissociate in solution.
  • The compounds containing metals are ionic. They produce ions in solution.
  • ZnI₂ and NiI₂ produce twice as many iodide ions as metal ions.
6 0
3 years ago
Which best describes a compound such as sodium chloride?
gayaneshka [121]

Answer:

check it below

Explanation:

NaCl; Sodium Chloride is an ionic compound formed by sodium and Chlorine.

Ionic bond is very strong, It can't be separated back to sodium and chlorine just by physical change. Chemicals which are more reactive can displace ions, thus seperate it

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2 years ago
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It smells so bad that no one or animal will get near it
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